We acknowledge the customer demand for Private Channels and have been hard at work on it. Private Channels is currently in preview with a select group of customers. We expect to release the feature to the public later this Fall, and will update here when we are starting to roll out to all customers. We appreciate all the feedback you have provided to us on this forum and thank you for your patience.

I think that an Export/Import function would work well for this, it would also achieve much better archiving. It would be solving 2 requests at once.
If I can export a channel and then re-import it back into the original team or another team, that would be great.
Exporting and importing whole teams would also be great.

I would expect that during the export all permissions are stripped, then when it's re-imported channels will assume the permissions of whatever team they're imported to (whether that be the original team or something new)

Importing a whole team might be more difficult as it would need to create an Office 365 team at the same time... perhaps you need to create the team first and then import the export into that team. Perhaps that's more complicated than it first seemed...

Further to this, I had a situation where I wanted to be on the call from my cell phone but share a desktop from the desktop app.
Obviously this get's quite complicated very quickly but if it was possible to conduct a call on one device while sharing a desktop on another that would be very impressive.

I would like an absolute toggle and the option for a timed unmute. Mute should only supress audible notifications, the channel should still bold when new messages are received.
My use case does not support muting at the conversation level.

Due to a priority shift this request has slipped to the backlog. I hate to bring bad news. I will continue to provide the feature team your feedback and votes.
Hopefully this will move back up in the queue soon.

We know you are patiently waiting for this feature. This feature is being implemented in stages. Fast tenant switching is currently in testing both internally and with early customers. We expect to release to the public in the Fall. I’ll post an update once it’s rolling out.

Full multi-tenant, multi-user support will be added after fast tenant switching.